Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Scan Tool Will Not Communicate

Scan Tool Will Not Communicate With Components With URAT Data Line (Part 1 Of 2):




Scan Tool Will Not Communicate With Components With URAT Data Line (Part 2 Of 2):




Scan Tool Will Not Communicate With Component On Class-2 Data Line VCM (Part 1 Of 2):




Scan Tool Will Not Communicate With Component On Class-2 Data Line VCM (Part 2 Of 2):




Scan Tool Will Not Communicate With Component On Class-2 Data Line EBCM:




Scan Tool Will Not Communicate With Component On Class-2 Data Line Passlock/EVO:




A Scan Tool can be connected to the Data Link Connector (DLC), this allows the Scan Tool to communicate with the Vehicle Control Module (VCM), the Passlock/Electronic Variable Orifice (EVO) module, Inflatable Restraint Sensing Diagnostic Module or the Electronic Brake Control Module (EBCM). System operations can then be monitored for diagnostic purpose.